<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="uname" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="listAdd">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="item in arr" :key="item.id">
          <td>{{ item.id }}</td>
          <td>{{ item.uname }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.gender }}</td>
          <td>
            <button @click="delList(item.id)">删除</button>
            <button @click="bianji(item)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      arr: JSON.parse(localStorage.getItem('list')) || [],
      uname: '',
      age: '',
      gender: '',
    }
  },
  methods: {
    //添加
    listAdd() {
      if (!this.uname || this.age <= 0 || !this.gender || !this.age)
        return alert('输入不合法')
      this.arr.push({
        id: this.arr.length ? this.arr.at(-1).id + 1 : 1,
        uname: this.uname,
        age: this.age,
        gender: this.gender,
      })
      //清空输入框
      this.uname = ''
      this.age = ''
      this.gender = ''
    },
    //删除
    delList(id) {
      this.arr = this.arr.filter((item) => item.id !== id)
    },
    //编辑  回显
    bianji(item) {
      //this.person = {...this.person}
      this.id = item.id
      this.uname = item.uname
      this.age = item.age
      this.gender = item.gender
      this.arr = this.arr.filter((item) => item.id !== this.id)
    },
  },
  watch: {
    arr() {
      // console.log(1);
      localStorage.setItem('list', JSON.stringify(this.arr))
    },
  },
}
</script>
